The American physicist Murray Gell-Mann (1929-) proposes that the proton and neutron are not themselves fundamental particles, but are instead composed of quarks which have fractional charges, occur in pairs and trios, and can never be detected singly. The quarks are bound together by exchanging gluons. The name quark is a whimsical designation taken from a passage in James Joyce’s (1882-1942) Finnegan’s Wake, which includes “Three quarks for Muster Mark”. (LANG, 2006: 79)